About: http://webisa.webdatacommons.org/403720549

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Tornadoes may sometimes occur after warning signs such as the darkening of the sky, hail, loud roaring sounds, debris being swept up, funnel-shaped clouds, fast moving clouds, and the formation of wall clouds.
http://www.w3.org/ns/prov#wasQuotedFrom	newsmax.com